Chapter 4. Ecosystems
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1 Chapter 4 Ecosystems
2 Chapter 4 Section 1: What Is an Ecosystem Key Vocabulary Terms 7 Adapted from Holt Biology 2008
3 Community A group of various species that live in the same habitat and interact with each other
4 Ecosystem A community of organisms and their abiotic environment.
5 Habitat A place where an organism usually lives California Red-Legged Frog Movement and Habitat Use
6 Biodiversity The variety of: organisms in an area genetic variation in a population species in a community communities in an ecosystem
7 Succession The replacement of one type of community by another at a single location over a period of time
8 Climate The average weather conditions in an area over a long period of time.
9 Biome A large region characterized by a specific type of climate and certain types of plant and animal communities
10 Predator and prey relationships A predator eats its prey.
11 Content Objectives I will be able to identify: The parts of an ecosystem. How an ecosystem responds to change. Two key factors of climate that determine a biome. The three major groups of terrestrial biomes The four kinds of aquatic ecosystems. Adapted from Holt Biology 2008
12 Chapter 4 Section 1: What Is an Ecosystem Notes Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
13 Chapter 4 Section 1: What Is an Ecosystem Ecosystems Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
14 YOUR TURN Active Reading Section 1 What is an Ecosystem? Adapted from Holt Biology 2008
15 Community of Organisms Predator and prey relationships A predator eats its prey.
16 Community of Organisms Biotic Factors describes living factors in an ecosystem
17 Physical Factors Abiotic factors nonliving part of the ecosystem
18 Biodiversity - Affected by abiotic factors & biotic factors Ecosystems with high biodiversity are better able to resist damage than those with low biodiversity.
19 THINK, SHARE, WRITE, (TSW) #1 List 3 examples of physical parts of an ecosystem.
20 THINK, SHARE, WRITE, (TSW) #1 List 3 examples of physical parts of an ecosystem. Water, Sunlight, Oxygen
21 5 & 6 & 7 Chapter 4 Section 1: What Is an Ecosystem Succession Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
22 Change in an Ecosystem When a volcano forms or when a fire burns an area, new organisms appear.
23 Pioneer species Lichen important pioneer species for soil formation
24 Pioneer species Small, fast-growing plants that appear first in the succession process.
25 4 Succession
26 An ecosystem responds to change in such a way that the ecosystem is restored to equilibrium Equilibrium
27 THINK, SHARE, WRITE, (TSW) #2 Why are pioneer species helpful to other species?
28 THINK, SHARE, WRITE, (TSW) #2 Why are pioneer species helpful to other species? Pioneer species change the habitat so that other species can then live in that habitat.
29 Chapter 4 Section 1: What Is an Ecosystem Major Biological Communities Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
30 Major Biological Communities Two key factors of climate that determine biomes are: Temperature Precipitation
31 Terrestrial Biomes (Land Biomes) Grouped by latitude
32 Terrestrial Biomes
33 Latitude The equator receives more solar energy than the more northern or southern latitudes. *the angle of heating causes different climate zones
34 Tropical Biomes Tropical rain forests A lot of rain, highest biodiversity.
35 Tropical Biomes Savannas grasslands
36 Tropical Biomes Tropical deserts
37 Temperate Biomes Temperate Grasslands
38 Temperate Biomes Temperate Forests
39 Temperate Biomes Temperate Deserts
40 High-Latitude (Polar) Biomes Taiga
41 High-Latitude (Polar) Biomes Tundra
42 THINK, SHARE, WRITE, (TSW) #3 In what latitudes are savannas found?
43 THINK, SHARE, WRITE, (TSW) #3 In what latitudes are savannas found? Savannas are found in Low Latitudes.
44 Aquatic Ecosystems Classified based on salt levels
45 Aquatic Ecosystems Classified based on salt levels Freshwater no salt
46 Aquatic Ecosystems Classified based on salt levels Wetlands marshes moderate flooding
47 Aquatic Ecosystems Classified based on salt levels Estuaries fresh water meets the ocean
48 Aquatic Ecosystems Classified based on salt levels Marine salty - oceans
49 THINK, SHARE, WRITE, (TSW) #4 Which aquatic ecosystems have salt water?
50 THINK, SHARE, WRITE, (TSW) #4 Which aquatic ecosystems have salt water? Marine communities and estuaries are ecosystems that have salt water.
51 Chapter 4 Section 2: Energy Flow in Ecosystems Key Vocabulary Terms 5 Adapted from Holt Biology 2008
52 Producer A photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem
53 Consumer An organism that eats other organisms or organic matter; heterotroph What organisms are consumers?
54 Decomposer An organism that feeds by breaking down organic matter from dead organisms; heterotroph
55 A step in the food chain or food (energy) pyramid Trophic Level
56 Energy Pyramid A triangular diagram that shows ecosystem s loss of energy through the food chain in an ecosysteman
57 Content Objectives I will be able to identify: How energy flow through an ecosystem. What happens to energy as it is transferred between trophic levels in a community Adapted from Holt Biology 2008
58 Chapter 4 Section 2: Energy Flow in Ecosystems Notes Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
59 Chapter 4 Section 2: Energy Flow in Ecosystems Trophic Levels Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
60 YOUR TURN Active Reading Section 2 Energy Flow in Ecosystems Adapted from Holt Biology 2008
61 Trophic Levels Energy flows through an ecosystem from the Sun to Producers to Consumers to Decomposers.
62 Trophic Levels Energy cannot be recycled! Energy flow is one way.
63 THINK, SHARE, WRITE, (TSW) #5 Where do consumers get their energy?
64 THINK, SHARE, WRITE, (TSW) #5 Where do consumers get their energy? Consumers get their energy from eating producers or other consumers. Ultimately, all living organisms get their energy from the sun.
65 Food Chains Shows the flow of energy through organisms Grass Zebra Lion Vulture Decomposers
66 Food Webs A complicated, interconnected group of food chains
67 Chapter 4 Section 2: Energy Flow in Ecosystems Loss of Energy Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
68 Loss of Energy Energy is stored at each link in a food web. Some energy that is used is LOST as HEAT into the environment. That energy CANNOT be recycled.
69 Ten Percent Rule Only 10 percent of the energy consumed is stored at each trophic level.
70
71 THINK, SHARE, WRITE, (TSW) #6 When energy is transferred from one trophic level to another, where does 90% of the energy go?
72 THINK, SHARE, WRITE, (TSW) #6 When energy is transferred from one trophic level to another, where does 90% of the energy go? 90% of the energy in a predator s prey is lost to the environment as heat as the predator burns the energy to do work, such as running and breathing, etc.
73 Chapter 4 Section 3: Cycling of Matter Key Vocabulary Terms 4 Adapted from Holt Biology 2008
74 Carbon Cycle The movement of carbon through the environment
75 Respiration The exchange of oxygen and carbon dioxide between living cells and their environment
76 Nitrogen Cycle The cycling of nitrogen through organisms, soil, water, and the atmosphere
77 Phosphorus Cycle The cycling of phosphorus through organisms and the environment
78 Content Objectives I will be able to identify: The parts of the water cycle. The importance of plants and animals for carbon and oxygen in an ecosystem. Why nitrogen must cycle through an ecosystem. Why phosphorus must cycle through an ecosystem. Adapted from Holt Biology 2008
79 Chapter 4 Section 3: Cycling of Matter Notes Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
80 Chapter 4 Section 3: Cycling of Matter Water Cycle Adapted from Holt Biology 2008 Adapted from Holt Biology 2008
81 Water Cycle
82 The continuous movement of water through the atmosphere, land, and oceans. Water Cycle
83 Water Cycle Condensation gas to liquid
84 Water Cycle Precipitation water falls to Earth
85 Water Cycle Percolation soaks into groundwater
86 Water Cycle Evaporation liquid to gas
87 Water Cycle Transpiration evap. from plants
88 YOUR TURN Active Reading Section 3 Cycling of Matter Adapted from Holt Biology 2008
89 Carbon (oxygen) Cycle The continuous movement of carbon through living things, nonliving things and back.
90 Carbon (oxygen) Cycle Photosynthesis CO 2 to Carbohydrate CO2+ H2O C6H12O6 + O2
91 Carbon (oxygen) Cycle Respiration Biomolecules to C6H12O6 + O2 CO2+ H2O
92 Carbon (oxygen) Cycle Combustion burning C released to air Death - Decomposition
93 THINK, SHARE, WRITE, (TSW) #7 How does respiration play a role in cycling carbon and oxygen through an ecosystem?
94 THINK, SHARE, WRITE, (TSW) #7 How does respiration play a role in cycling carbon and oxygen through an ecosystem? Respiration is a part of the carbon cycle because it is a process in which oxygen and carbon are exchanged between living organisms and their environment.
95 Nitrogen Cycle The continuous movement of nitrogen through living things to make protein.
96 Nitrogen fixation a process by which nitrogen (N 2 ) in the atmosphere is converted into ammonia (NH 3 ). Atmospheric nitrogen or molecular nitrogen (N 2 ) does not easily react with other chemicals to form new compounds. Fixation processes free up the nitrogen atoms from their diatomic form (N 2 ) to be used in other ways. Nitrogen Cycle
97 Nitrogen Cycle Nitrogen fixation soil bacteria and lightening combine N 2 with H to make ammonia
98 Nitrogen Cycle Assimilation Plant roots absorb Nitrogen (N)
99 Nitrogen Assimilation The formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds present in the environment. Organisms like plants, fungi and certain bacteria that cannot cannot fix nitrogen gas (N 2 ) depend on the ability to assimilate nitrate or ammonia for their needs. Other organisms, like animals, depend solely on organic nitrogen from their food.
100 Nitrogen Cycle Ammonification waste and decomposing organisms return NH3 to the soil
101 Ammonification When a plant or animal dies, or an animal expels waste, the initial form of nitrogen is organic. Bacteria, or fungi in some cases, convert the organic nitrogen within the remains back into ammonium (NH 4+ ),
102 Nitrogen Cycle Nitrification Nitrite (NO 2 ) to Nitrate (NO 3 )
103 Nitrification The biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites (NO 2 ) into nitrates (NO 3 ). Nitrification is an important step in the nitrogen cycle in soil
104 Nitrogen Cycle Denitrification Nitrate to N gas
105 THINK, SHARE, WRITE, (TSW) #8 Explain the role of bacteria in the nitrogen cycle.
106 THINK, SHARE, WRITE, (TSW) #8 Explain the role of bacteria in the nitrogen cycle. Bacteria breaks down N 2 into a form that other organisms can use.
107 Phosphorus Cycle The continuous movement of phosphorus through living things to make ATP and Nucleic Acids (DNA and RNA).
108 THINK, SHARE, WRITE, (TSW) #9 How does phosphorus play a role in living organisms? Phosphorus is absorbed by the roots of plants.
109 Use the climate graph for Turlock below to determine the average precipitation, the average high temperatures, and the average low temperatures
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